RK:主屏幕

Platform: RK3288
OS: Android 7.1
Kernel: 4.4.143

Android7.0 DirectBoot阻塞开机分析 宇落无痕 https://blog.csdn.net/fu_kevin0606/article/details/65437594

一.需求: 仿Android5.1 Settings.apk 上的 设置 主屏幕
问题点:a.动态显示 一级设置列表 主屏幕
           b.二级设置列表 home 属性的list

二.Android 7.1 Setttings home识别个数异常
2.1.home属性的apk 有两个 Settings.apk Launcher.apk

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private int getHomeActivitiesCount() {     final ArrayList<ResolveInfo> homeApps = new ArrayList<ResolveInfo>();     getPackageManager().getHomeActivities(homeApps);     return homeApps.size(); }

2.2.launcher启动流程增加了settings--->FallbackHome--->launcher

在启动Launcher之前会先启动一个FallbackHome，之后才会启动Launcher，而FallbackHome属于Settings中的一个透明的activity，
Settings的android:directBootAware=true，并且FallbackHome在category中配置了Home属性，而Launcher的
android:directBootAware=false，所以只有FallbackHome可以在direct boot模式下启动

补:Direct Boot模式下app是无法运行的要运行的话需要在AndroidManinfest.xml中设置 android:directBootAware="true"

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<!-- Triggered when user-selected home app isn't encryption aware --> <activity android:name=".system.FallbackHome"           android:excludeFromRecents="true"           android:theme="@style/FallbackHome">     <intent-filter android:priority="-1000">         <action android:name="android.intent.action.MAIN" />         <category android:name="android.intent.category.HOME" />         <category android:name="android.intent.category.DEFAULT" />     </intent-filter> </activity>

其中包括home属性，这样影响后续识别home属性的应用，这里介绍一个过滤的办法:

 https://www.cnblogs.com/crushgirl/p/13437967.html

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1	android:excludeFromRecents="true"

在 Android 系统中，如果我们不想某个 Activity 出现在 “Recent screens” 中，可以设置这条属性:

2.3.packages\apps\Settings\src\com\android\settings\HomeSettings.java

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private void buildHomeActivitiesList() {     ArrayList<ResolveInfo> homeActivities = new ArrayList<ResolveInfo>();     ComponentName currentDefaultHome  = mPm.getHomeActivities(homeActivities);       Context context = getPrefContext();     mCurrentHome = null;     mPrefGroup.removeAll();     mPrefs = new ArrayList<HomeAppPreference>();     mHomeComponentSet = new ComponentName[homeActivities.size()];     int prefIndex = 0;     boolean supportManagedProfilesExtra =             getActivity().getIntent().getBooleanExtra(EXTRA_SUPPORT_MANAGED_PROFILES, false);     boolean mustSupportManagedProfile = hasManagedProfile()             || supportManagedProfilesExtra;     for (int i = 0; i < homeActivities.size(); i++) {         final ResolveInfo candidate = homeActivities.get(i);         final ActivityInfo info = candidate.activityInfo;         ComponentName activityName = new ComponentName(info.packageName, info.name);         mHomeComponentSet[i] = activityName;         try {             Drawable icon = info.loadIcon(mPm);             CharSequence name = info.loadLabel(mPm);             HomeAppPreference pref;               if (mustSupportManagedProfile && !launcherHasManagedProfilesFeature(candidate)) {                 pref = new HomeAppPreference(context, activityName, prefIndex,                         icon, name, this, info, false /* not enabled */,                         getResources().getString(R.string.home_work_profile_not_supported));             } else  {                 pref = new HomeAppPreference(context, activityName, prefIndex,                         icon, name, this, info, true /* enabled */, null);             }              //FLAG_EXCLUDE_FROM_RECENTS这里对应上述的属性 android:excludeFromRecents             if ((info.flags & ActivityInfo.FLAG_EXCLUDE_FROM_RECENTS) == 0){             mPrefs.add(pref);             mPrefGroup.addPreference(pref);             }             if (activityName.equals(currentDefaultHome)) {                 mCurrentHome = pref;             }             prefIndex++;         } catch (Exception e) {             Log.v(TAG, "Problem dealing with activity " + activityName, e);         }     }       if (mCurrentHome != null) {         if (mCurrentHome.isEnabled()) {             getActivity().setResult(Activity.RESULT_OK);         }           new Handler().post(new Runnable() {            public void run() {                mCurrentHome.setChecked(true);            }         });     } }

 三.Android5.1 设置主launcher

3.1.frameworks\base\services\core\java\com\android\server\am\ActivityManagerService.java　　

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private void setDefaultLauncher() {                  String packageName = SystemProperties.get("persist.app.pkgName","com.android.launcher3");     String className = SystemProperties.get("persist.app.className","com.android.launcher3.Launcher");              Slog.i(TAG, "defautl packageName = " + packageName + ", default className = " + className);                  if ((packageName != null && packageName.trim().length() > 1) && (className != null && className.trim().length() > 0)) {                       IPackageManager pm = ActivityThread.getPackageManager();               ArrayList<IntentFilter> intentList = new ArrayList<IntentFilter>();              ArrayList<ComponentName> cnList = new ArrayList<ComponentName>();              mContext.getPackageManager().getPreferredActivities(intentList, cnList, null);              IntentFilter dhIF;              for(int i = 0; i < cnList.size(); i++)              {                  dhIF = intentList.get(i);                  if(dhIF.hasAction(Intent.ACTION_MAIN) &&                  dhIF.hasCategory(Intent.CATEGORY_HOME))                   {                      mContext.getPackageManager().clearPackagePreferredActivities(cnList.get(i).getPackageName());                  }              }               Intent intent = new Intent(Intent.ACTION_MAIN);              intent.addCategory(Intent.CATEGORY_HOME);              List<ResolveInfo> list = new ArrayList<ResolveInfo>();              try               {                  list = pm.queryIntentActivities(intent,                      intent.resolveTypeIfNeeded(mContext.getContentResolver()),                      PackageManager.MATCH_DEFAULT_ONLY,UserHandle.getCallingUserId());              }catch (RemoteException e) {                  throw new RuntimeException("Package manager has died", e);              }               IntentFilter filter = new IntentFilter();              filter.addAction(Intent.ACTION_MAIN);              filter.addCategory(Intent.CATEGORY_HOME);              filter.addCategory(Intent.CATEGORY_DEFAULT);              final int N = list.size();              ComponentName[] set = new ComponentName[N];              int bestMatch = 0;              for (int i = 0; i < N; i++)              {                  ResolveInfo r = list.get(i);                  set[i] = new ComponentName(r.activityInfo.packageName,r.activityInfo.name);                                   if (r.match > bestMatch) bestMatch = r.match;              }              ComponentName launcher = new ComponentName(packageName, className);              try               {                  pm.addPreferredActivity(filter, bestMatch, set, launcher,UserHandle.getCallingUserId());              } catch (RemoteException e) {                  throw new RuntimeException("Package manager has died", e);              }                 }  }

3.2.setDefaultLauncher();

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boolean startHomeActivityLocked(int userId, String reason) {     if (mFactoryTest == FactoryTest.FACTORY_TEST_LOW_LEVEL             && mTopAction == null) {         // We are running in factory test mode, but unable to find         // the factory test app, so just sit around displaying the         // error message and don't try to start anything.         return false;     }           setDefaultLauncher();           Intent intent = getHomeIntent();     ActivityInfo aInfo =         resolveActivityInfo(intent, STOCK_PM_FLAGS, userId);     if (aInfo != null) {         intent.setComponent(new ComponentName(                 aInfo.applicationInfo.packageName, aInfo.name));         // Don't do this if the home app is currently being         // instrumented.         aInfo = new ActivityInfo(aInfo);         aInfo.applicationInfo = getAppInfoForUser(aInfo.applicationInfo, userId);         ProcessRecord app = getProcessRecordLocked(aInfo.processName,                 aInfo.applicationInfo.uid, true);         if (app == null || app.instrumentationClass == null) {             intent.setFlags(intent.getFlags() | Intent.FLAG_ACTIVITY_NEW_TASK);             mStackSupervisor.startHomeActivity(intent, aInfo, reason);         }     }       return true; }

3.3.客户应用

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罒.应用在category中配置了Home属性 <category android:name="android.intent.category.HOME" />           罒.设置属性 3.3.1             setProperty("persist.app.pkgName", "com.android.launcher3");// 包名             setProperty("persist.app.className", "com.android.launcher3.Launcher");// 类名             RootCommand("reboot");// 重启生效               3.3.2.              @SuppressWarnings("finally")     public String getProperty(String key) {         String value = "unknown";         try {             Class<?> c = Class.forName("android.os.SystemProperties");             Method get = c.getMethod("get", String.class, String.class);             value = (String) (get.invoke(c, key, "unknown"));         } catch (Exception e) {             e.printStackTrace();         } finally {             return value;         }     }       public void setProperty(String key, String value) {         try {             Class<?> c = Class.forName("android.os.SystemProperties");             Method set = c.getMethod("set", String.class, String.class);             set.invoke(c, key, value);         } catch (Exception e) {             e.printStackTrace();         }     }       public void RootCommand(String cmd) {         Process process = null;         DataOutputStream os = null;         DataInputStream is = null;         try {             process = Runtime.getRuntime().exec("su");             os = new DataOutputStream(process.getOutputStream());             os.writeBytes(cmd + "\n");             os.writeBytes("exit\n");             os.flush();             int aa = process.waitFor();             is = new DataInputStream(process.getInputStream());             byte[] buffer = new byte[is.available()];             is.read(buffer);             String out = new String(buffer);         } catch (Exception e) {             e.printStackTrace();         } finally {             try {                 if (os != null) {                     os.close();                 }                 if (is != null) {                     is.close();                 }                 process.destroy();             } catch (Exception e) {             }         }     } }